Machine for setting tack-strips



(No Model.)

, M. BROOK.

MAOHINBPOR SETTING TAGK STRIPS.

Patented Apr. '23, 1889.

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u. PETERS. Plum-Lithographer. Wnihlngton. n=c.'

UNITE STATES PATENT OFFICE.

MATTIIIAS BROOK, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE MCKAY &COPELAND LASTING MACHINE COMPANY, OF PORTLAND, MAINE.

MACHINE FOR SETTING TACK-STRIPS.

. SPECIFICATION forming part of Letters Patent No. 402,059, dated April23, 1889.

' Application filed leptember 7, 1888. Serial No. 284,783. (No model.)

To aZZ whom it may concern:

.Be it known that I, MATTHIAS BROOK, of Boston, county of Suffolk, Stateof Massachusetts, have invented an Improvement in Machines for SettingTack-Strips, of which the following description, in connection with theaccompanying drawings, is a specification, like letters on the drawingsrepresenting like parts.

This invention has for its object to improve the machines described inUnited States Patents Nos. 230,386 and 247,143, to which reference maybe had. In the patents referred to a series of tacks are driven into astrip of paper, and the feed-movement of the paper is made dependentupon the insertion of a tack atthe proper time. In these niachinesreferred to the point of each tack is made to depress a spring-supportedlatch, and thereafter the feed-wheel is rotated; but if the latch is notdepressed the feed-wheel stands still. In practice it often happens thatthe needle-points of tacks being inserted in the strip are blunted bystriking the said latch or a part thereof to depress the latch, asstated.

The object of this invention is to prevent the blunting of the tacks.

In this my invention the point and body of the tack below the usualfeed-wheel enters a narrow space between inclined or wedging faces of apair of jaws, one member of which, as herein represented, is stationary,while the other is pivoted and thus movable, both members, however, ofthe jaws being capable of rising and falling in unison through theaction of the pressure of the body of the tack against the faces of thesaid jaws.

My invention consists, essentially, in, the combination, with thefeed-wheel of a tacksetting machine, of jaws between which enters thebody of the tack after it has been driven through the strip, the saidtack While pressed between the faces of the said jaws serving to depressthe jaws, thereby actuating devices to automatically turn the pivotedjaw on its pivot away from the vertically-movable jaw,'to leave an openspace for the lateral movement from between the said jaws of the body ofthe driven tack, the depression of the jaws by a tack acting to turn apawl-carrying lever and cause a pawl on the said lever to rot-ate thefeed-wheel one step, the absence of a tack failing to depress the saidlever, thus leaving the feed-wheel at rest.

Figure l is a top or plan view of a sufficient portion of a tack-settingmachine to enable my invention to be understood; Fig. 2, an elevation ofthe devices shown in Fig. 1, looking in the direction of the arrow.Figs. 3, 4, and 5 are details of the jaws in different positions. Figs.6 and 7 are partial side elevations of a modified form of jaw and.feedwheel; and Figs. 8 and 9, plan views of the parts shown in Figs. 6and 7, but with the feed-wheel and tack omitted.

The feed-wheel D, pawl 0, detentpawl O, lever (1 having the slot d andthe roadway E are and may be all as in United States Patent No. 247,143,wherein like letters are used to designate like parts.

The feed-wheel D next its under side has fastened to it a gear, a, andthe said gear has fixed to it a ratchet-wheel, b, the feed-wheel, gear,and ratchet-wheels being free to rotate in unison about the stud a. Thegear a and the ratchet b are shown, but not lettered, in the saidpatent. These parts, with the exception of the pawl 0, are all to beactuated as provided for in the said patent.

The pawl 0 is mounted upon a bell-crank lever, c 0, (shown partially bydotted lines, Fig. 1,) having its fulcrum on the stud a, the end 0 ofthe said lever being downward and provided with a dovetailed groove,(see Fig. 1,) in which is fitted loosely to slide vertically adovetailed bar, 3, forming one member of the jaws, to be described, theother member, 4, being pivoted on an ear of the said bar at 5, the lowerend of the pivoted j'aw 4 being pivoted to a link, 6, pivoted at 7 to anelbowshaped link, 8, pivoted at 9 to a lug extended backwardly from thebar 3, as best shown in Figs. 3 and 4.

The inner beveled or inclined faces of the upper ends of the bar 3 andjaw 4 are normally somewhat separated, sufficiently so to enable thepoint of the tack 25, below the feedwheel D, to pass between the saidfaces, the

body of the tack just beyond the sharp point contacting with the saidfaces, and by pressure of the opposite sides of the said body againstthe said faces cause the descent of the said jaws in unison, the slidebeing normally held up, with its upper end close to the under side ofthe feed-wheel, by a very slight spring, 2, preferably of U shape and ofconsiderable length.

The pivot 7, between the links U and 8, is acted upon by the free end ofa spring, 13, the opposite end of which is fixed to the pivot 14,connecting the link (3 and jaw l, the said spring 13 being of sufficientstrength to throw the levers (S and 8 into the position Fig. 3, andnormally keep the upper ends of the jaw members nearly touching.

As the tack is forced down from the position Fig. 3 into the positionFig. 4 the jaws are also depressed against the spring 12, and in theirdescent the foot 18 of the elbowshaped toggle-link 8 meets theadjustable stop 19, (shown as a screw held in the framework,) andsprings the said toggle-joint, thus automatically opening the jaws andkeeping them open, as shown in Fig. 4, while the feedwheel D is operatedthe distance of one tooth.

In practice, as in the Patent No. 247,155 referred to, the lever (Z isvibrated constantly, and in its vibration it acts to turn thepawlcarrying lever 0 0 provided the bar has been forced down by the bodyof a tack, so as to bring the notched portion 20 at the edge of the bar3 in the range of movement of the projection or finger 21, adj ustablyattached to the lever d"; but if the bar 3 is not depressed by the bodyof a tack, as described, the projection or finger 21 enters the deepernotch, 22, at the edge of the bar 3, and as a result thereof does notstrike the said bar and move it and the pawl-carrier c c, as when thesaidfinger or projection 21 enters the notch of less depth, andconsequently the feed of the wheel D takes place only when the saidfinger or projection 21 enters the notch 20.

I11 Figs. 6 to 9, showing a modified form of jaw, it will be noticed,especially in Fig. 8, showing a top view, that the jaws touch each otherexcept at about their center line, where each jaw has a semicirculargroove or score, forming a hole when the two jaws are closed, into whichmay pass the point of the tack, the said hole being closed on all sides;but when the jaws have been depressed, as stated, the toggle-leversconnected to them, as described of the jaws shown in Figs. 3 and 4, actto open the jaws, as in Fig. 9, thus leaving a clear space or slot forthe passage from between the said jaws of the body of the tack.

I do not desire to limit my invention to the faces of the jaws touchingor not touching, nor do I desire to limit my invention to the exact formof jaws shown, as I consider as within the scope of my invention anyform of jaws which are adapted to freely receive the sharp point of thetack between them and the action of the opposite sides of the body ofthe tack to depress the jaws, and thus determine whether or not thefeeding mechanism for actuating the feed-wheel shall operate to move thefeed-wheel and feed the usual paper or other strips.

I claim 1. In a tack-setting machine, a feedingwheel for the strip andactuating devices to move the said feeding-wheel, combined with jawsbetween which to force the body of a tack, as described, the presence ofthe body of a tack between the faces of the said jaws insuring theaction of the said actuating mechanism to move the feed-wheel,substantial] y described.

2. The feed-wheel and the Vertically-movable jaws and their connectingspring-actuated toggle-links, combined with a stop to spring the saidlinks and open the said jaws for the passage laterally from between themof the body of a driven tack, substantially as described.

In testimony whereof I have signed my name to this speci fication in thepresence of two subscribing witnesses.

MATTIIIAS BROOK.

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G. 3V. GREGORY, l DEWAR.

